The generation of UWB(Ultra Wide-Band) multi-pulse is studied through the investigation, combined with the characteristics of UWB pulse. The technical research includes the UWB multi-pulse generation by the means of pulse sequence, forming line in series connection, and multi-pulse synthesis. The technical way of generating UWB instant multi-pulse by the means of forming line in series connection is confirmed. The effects of charging time and switched capacitor on multi-pulse generation are analyzed and the experiments are also conducted. The charging method of four-pulse forming line is improved. The design of experiment equipment used for the generation of UWB 4 pulses is completed. The UWB instant multi-pulse is obtained on the load, which have the characteristics of 4 pulses, pulse width of 3.5 ns, pulse interval below 10 ns.